You can see three almost identical images below. Can you spot the odd one out from them?

What is the last thing you take off before bed?

Our product and our sum always give the same answer. Who are we?

Count the number of triangles in the given picture.

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

Which wheel of car does not rotate when you turn your car right?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

There is an ancient kingdom where every married woman keeps information regarding the fidelity of other men. However, what they don't know is the fidelity of their own husbands. Also, there is an ancient belief that they don't tell each other about the fidelity of their husbands.

On a certain day, the queen of the kingdom declares that she has identified at least one unfaithful man in the kingdom. She allows the wives to identify and gives them authority to kill their husbands if they are unfaithful at midnight.

How will the wives manage it?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

People make me, save me, change me, raise me. What am I?